Beware of this (from the FAQs):
When using my World of Hyatt Credit Card, do I earn World of Hyatt Bonus Points at Participating Mr & Mrs Smith Properties like I would at Hyatt hotels and resorts?
No. Currently, Participating Mr & Mrs Smith Properties are not considered a “Hyatt hotel or resort” for purposes of earning bonus points on World of Hyatt credit card spend.
Hopefully this isn't a permanent state of affairs but I have a feeling that it may be.